Gamma, E., Helm, R., Johnson, R., & Viissides, J. (1995). Design patterns: Elemets of reusable object - oriented software. Boston: Addison - Wesley.
Chicago Style aipamenaGamma, Erich, Richard Helm, Ralph Johnson, và John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.
MLA aipamenaGamma, Erich, Richard Helm, Ralph Johnson, và John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.
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